Spacing bab ob core fob plastic work



Patented July 8, 1919.

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E. A. ZIMMERMAN. SPACING BAR 0R CORE `FOR PLASTIC WORK.

APPLICATION FILED APR. L9. 1919. 1,309,084.

/f Z/NNERMAN III-III llllln E. A. ZIMMERMAN. SPACINQBAR 0R coRE'roR PLASTIC woRK.

vAPPLICATION FILED APR. I9. 1919.

Patented July 8, 1919.

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UNITED sTATEs PATENT. oEEIcE- EDGAR A. ZIHHERKAN, 0F SHAMOXIN, PENNSYLVANIA.I

enumeran casona ron PLASTIC wonx. BEST AV Speeication of Letters Patent.

Patented July 8, 1919.

application mea April 19, 1919. serial No. 291,238.

suitable core for any plastic or concrete'work emlploying a substance which solidies, that w1 l be easy to manufacture and also inexpensive to produce.-

A further ob'ect is to construct a core or spacing bar whlch will be made vin 'different sizes and can be repeatedly used without any deterioration in quality.

Another object is to construct the core, so that it may be readily removable and, when thus removed, a Ventilating opening will be left in the concrete wall.

Other obects will appear as the description procee s.v

In the drawings which constitute a part of my specification Figure 1 is a perspective view of a conw1th a hammer will dislodge 1t, and later the crete form with my .invention applied.

F1g. 2 is a horlzontal section on the line 2--2 of Fig. 3. v

Fig. 3 is a vertical section on the line-3--3` of Fig-1.

Fig. 4 is a perspective view kof a pillar with my invention applied.

Fig. 5 is a transverse section thereof.

Fig. 6 is a central vertical longitudinal section of my spacing member.

Fig. 7 is a transverse section on the line f designate similar parts throughout the several views.

The core 1 is substantially rectan llar in shape and square in end vlew, the si es 2, 3,

4 and 5 t'apkelring from'the larger end to the e two sides 2 and 3 are the same length .and have their opposite end portions or shoulders 6 and T bentat right angles,

same length, the to thereby forming vertical slots'in each end.

The top and bottom sides 4 and 5 are the extending the full length of the core,'an the bottom having its ends'bent upward to form shoulders 8 and 9 extending a short distance back of the shoulders 6 and 7. The three shoulders on each end are' bent so as to form a seat or socket for nuts 10, and the vertical slots are so constructed, as to permit a slight adjustment of the bolts which hold the corein position between the forms 11 and12 of the concrete ywall 13, and engage the nuts 10. Pins 14 and 15 are positioned transverse of said core, a slight distance above its bottom and in vertical alinement with' the shoulders 8 and 9, said pins and shoulders forming al rigid socket for the said nuts 10.

In operation, I place a nut in the socket at each end of the core and place a series of cores in place between the forms. A series of bolts are then placed through each form to engage and connect with the nuts in the several cores. When the bolts are tightened,

t the mold will be complete and ready for the concrete to be poured in. After the concrete has hardened, the bolts are unscrewed and .the sides of the forms taken of. The cores may remain in the walls if so desired, or a slight tap-on the smaller end of said core hole can be plugged or plastered.

Itis obvious-that it might be desirous of having a scaffold on the wall of the house. In this case, a small wedge could be inserted in the hole and a bolt fastened to it and extending beyond the surface of the wall, thereby making it possible to attach said scaffold or any exterior overhanging work. By using this device, the expensive and troublesome method of wiring the forms to ether is eliminated.

ometimes the cores or s acing bars Vare extracted and the holes le open for the purpose of ventilation.

I prefer to make my core of approximately quarter inch pressed steel, so that the sockets for the nuts, in each end of the core will be strong enough to hold a scaffold or fire escape in place.

By placing the core in position with' the.- top up, it ay be used repeatedly without any cha the concrete runnin into the sockets, especially as the nuts are ush with the outside of the core, 'andpfit snugly therein. This" core will roVe to be inexpensive to manufacture and, Very eiicient for the purposes hereinbefore specified.

Another operation in using my core isl to place the bolts through the walls .of the forms with the nuts on said bolts. It will be apparent that it will be an easy matter to slide the cores in lace and tighten them up with a wrench. y he body of the core is made substantially square so that itl is adapted to be engaged by a wrench for quick positioning.

Many minor changes in detail' of construction maybe resorted to without depart- Iinglfrom the spirit-of the invention.

aving thus described my invention what I claim as new and desire to secure by Let-- ters Patent of the United States is:

'1. A core for concrete work, comprisin a substantially rectangular shaped body and sockets on each end for holding nuts, for the purpose speciied.

2; A core or clamp, having a portion 'of three of its sides bent in, substantially at right angles with said sides, thereby forming rigid sockets at eitherend'.

-ment with the lower bent 3. A tapering core for concrete work, havingits sides bent to form vertical slots, and pins transverse of said core, and in alineportion or shoulder, the whole for producmg a rigid seat for nuts.

4. A one piece core for concrete work, the

bottom of said core having-its end portions extending u wardly, the sides extending at right ang es to said core, thereby forming a socket at either of its ends.

5. A one piece core for concrete work,

sockets in the ends of said core, the outer ends of said sockets havin ,vertioalalined openings, substantially as escribed.

6. AA core Afor concrete work, vertical shoulders or wingsfon the ends of said core, and shouldersv on thebottom of said core and parallel with said vertical shoulders, transverse pins in alinementwith the shoulders on the bottom of said core, the whole forming a rigid socket for the reception of nuts.

In testimony whereof I aiiix my signature.

EDGAR A. ZIMMERMAN. 

